/Engine/Source/Runtime/Online/HTTPServer/Public/IHttpRouter.h
Register a request preprocessor. Useful for cases where you want to drop or handle incoming requests before they are dispatched to their respective handler.FDelegateHandleThe handle to the delegate, used for unregistering preprocessors.
[FDelegateHandle](API\Runtime\Core\Delegates\FDelegateHandle) RegisterRequestPreprocessor ( FHttpRequestHandler RequestPreprocessor )